Surface Roughness and Necessity of Manual Refinishing Requirements of CAD/CAM-Manufactured Titanium and Cobalt-Chrome Bars – A Pilot Study

Gehrke, Peter; Dinkel, Jochen; Fischer, Carsten; Schmenger, Kai; Sader, Robert

doi:10.2174/1874210601913010316

Cited by 4 publications

(1 citation statement)

References 38 publications

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“…Während es zahlreiche Untersuchungen zur Klassifikation, Morphologie und optimalen Oberflächenrauheit des enossalen und transmukosalen Anteils von Implantaten gibt, liegen bisher keine verlässlichen Informationen über die Auswirkung von Oberflächenqualität, Topografie und Rauheit von industriell hergestellten CAD/CAM-Kobalt-Chrom-oder Titanstegen auf das periimplantäre Weichgewebe vor [28 -30]. Ziel unserer Bemühungen war es daher, die Oberflächentopografie von CAD/CAM-Kobalt-Chrom-oder titangefertigten Stegen unterschiedlicher Hersteller an definierten Regionen (ROI) mittels profilometrischer Analyse zu charakterisieren [31]. Ferner wurden die unterschiedlichen Stege nach der CAD/CAM-Produktion einer makroskopischen Bewertung durch erfahrene Zahntechniker unterzogen, die den zusätzlich notwendigen Arbeitsaufwand einschätzen sollten, um eine klinisch akzeptable Oberflächengüte durch manuelle Nachpolitur zu erreichen.…”

Section: Introductionunclassified

Oberflächengüte von CAD/CAM-gefrästen Implantatstegen aus Titan und Kobalt-Chrom

Gehrke¹,

Fischer²,

Schmenger³

et al. 2020

ZWR - Das Deutsche Zahnärzteblatt

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Section: Introductionunclassified

Oberflächengüte von CAD/CAM-gefrästen Implantatstegen aus Titan und Kobalt-Chrom

Gehrke¹,

Fischer²,

Schmenger³

et al. 2020

ZWR - Das Deutsche Zahnärzteblatt

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Evaluation of patient satisfaction and maximum biting force of three differently constructed bars on two implants retaining mandibular overdenture - one year follow-up (a randomized controlled clinical trial)

Badr,

Nabawy,

Mohammed

et al. 2024

BMC Oral Health

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Background Different bar construction techniques will affect the bar passive fitness, which may induce stresses or strain on the implant and/or tightening screw and sequentially may affect the biting force and patient satisfaction. Aim of the study This clinical investigation assessed patient satisfaction and maximum biting force (MBF) using three differently constructed (conventional casting, milling, and 3D printing CAD/CAM techniques) cobalt-chromium (Co-Cr) bar-retained implants mandibular overdentures over a one-year period of follow-up. Materials and methods Thirty edentulous patients seeking for two implants bar-retained mandibular overdentures were randomly assigned into three groups as the following: Group I: 10 patients received a Co-Cr conventional casting bar, Group II: 10 patients received a Co-Cr CAD/CAM milled bar, and Group III: 10 patients received a Co-Cr CAD/CAM 3D-printed bar. All the bar groups were connected to two implants in the canine area bilaterally. Within the first two weeks following implant placement, patients received the definitive prosthesis. Patient satisfaction was evaluated by using the (OHIP-EDENT-19) questionnaire form after 6, and 12 months. Additionally, the maximum biting force was tested at after delivery, 3, 6, and 12 months for each group. The results were collected, tabulated, and statistically analyzed. Trial registration: This study was recorded on ClinicalTrials.gov retrospectively registered (ID: NCT06401187) on 30/04/2024. Results After one year follow up, regrading patient satisfaction the three groups showed no statistically significant difference. Although, the functional limitation domain was in favor of the milled bar. Regarding the maximum biting force, no statistically significant difference was found among three groups. However, at 12 mouths follow-up the milled bar showed statistically value. Conclusion Within the limitations of this study, the conventional, milled and 3D printed bar overdentures groups can be used as a satisfactory treatment modality for edentulous mandible in terms of patient satisfaction and maximum biting force.

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The Effect of Cutting Parameters on Surface Roughness and Morphology of Ti-6Al-4V ELI Titanium Alloy during Turning with Actively Driven Rotary Tools

Harun

Burhanuddin

Ibrahim

2022

JMMP

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The titanium alloy Ti-6Al-4V ELI is most commonly used for medical implant products because it is corrosion resistant, high strength, and lightweight. In actuality, the temperature will be very high during the machining of this material. This will accelerate the tool wear and affect the surface roughness. Turning with the Actively Driven Rotary Tool (ADRT) has been proven to decrease the cutting temperature so that it is suitable for machining the Ti-6Al-4V ELI. This study focuses on investigating the surface roughness and morphology of Ti-6Al-4V ELI when turning with the ADRT. The surface roughness was measured using the surface profile tester, while the surface morphology was observed using a Scanning Electron Microscope (SEM). The turning with ADRT parameters consisting of the tool diameter, cutting speed, tool revolution speed, feed, and tool inclination angle were analyzed for their effects on the surface roughness. Results show that the cutting speed and tool inclination angle have a significant effect, with a contribution effect of about 67% on the average surface roughness (Ra). The increasing cutting speed resulted in the increased average surface roughness (Ra). The average surface roughness (Ra) also increased with an increasing tool inclination angle. Moreover, no physical damage was observed, such as cracks, micro-pits, and a white layer on the material’s surface morphology.

show abstract

Surface Roughness and Necessity of Manual Refinishing Requirements of CAD/CAM-Manufactured Titanium and Cobalt-Chrome Bars – A Pilot Study

Cited by 4 publications

References 38 publications

Oberflächengüte von CAD/CAM-gefrästen Implantatstegen aus Titan und Kobalt-Chrom

Oberflächengüte von CAD/CAM-gefrästen Implantatstegen aus Titan und Kobalt-Chrom

Evaluation of patient satisfaction and maximum biting force of three differently constructed bars on two implants retaining mandibular overdenture - one year follow-up (a randomized controlled clinical trial)

The Effect of Cutting Parameters on Surface Roughness and Morphology of Ti-6Al-4V ELI Titanium Alloy during Turning with Actively Driven Rotary Tools

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